Speeding up Linux Using hdparm(6 tags)Instantly double the I/O performance of your disks or, in some cases, show 6 to 10 times your existing throughput!

Profiling Your Applications with Eclipse Callisto(5 tags)Callisto, a bundle of optional plugins for Eclipse, now comes with a profiling tool called the Test & Performance Tools Platform (TPTP). TPTP includes testing, tracing, performance monitoring, profiling, and static-code analysis tools. John Ferguson Smart offers this guided tour of how to use TPTP to speed up your apps.

Introducing LAMP Tuning Techniques(3 tags)Having a successful web site can be a mixed blessing. It's nice to reach more people, but it's painful to run up against hardware limits. Fortunately, LAMP sites have several tuning options, from tweaking parameters to replacing components. Adam Pedersen explains.

Bitwise Optimization in Java: Bitfields, Bitboards, and Beyond(2 tags)Flipping bits on and off is the lowest level of computing, and most Java developers are totally isolated from it. But maybe they shouldn't be. In this article, Glen Pepicelli introduces the idea of bitsets--ints and longs whose bitwise representation are the data you're interested in--and how they can be used with mathematical and logical operators to write faster code.

How to Misuse SQL's FROM Clause(2 tags)Many SQL queries misuse their FROM clauses. Misuse them? That's right. Stéphane Faroult explains this common mistake and demonstrates how two types of subqueries can improve performance and reliability.